Trouble with latest zfstools package

[Greg Rivers]

After: [1/5] Upgrading zfstools from 0.3.2_2 to 0.3.4...

I see:
/usr/local/lib/ruby/site_ruby/2.1/zfstools/snapshot.rb:118:in `/': divided by 0 (ZeroDivisionError)
        from /usr/local/lib/ruby/site_ruby/2.1/zfstools/snapshot.rb:118:in `create_many'
        from /usr/local/lib/ruby/site_ruby/2.1/zfstools.rb:152:in `do_new_snapshots'
        from /usr/local/sbin/zfs-auto-snapshot:68:in `<main>'

on every run.

-- 
Greg Rivers